We are each drawn to different crystals at different times. It might be the color or energy of the crystal that resonates with you. Or it may be the individual properties of a particular crystal that drew you to it. You may not even know or understand why you were drawn to it and that's ok, just let it happen.
If you're trying to decide which crystal will work for your intention, go with what feels right to you. But in case you're truly stumped, here is a list of a few crystals and their known properties:
Amethyst: calming, inner peace, dispels negativity, relieves stress, enhances intuition, enhances spiritual awareness, strengthens immune system, reduces pain, aids in tissue regeneration, eases headaches, releases tension, cleanses the blood, reduces bruising and swelling, helps heal skin conditions, helps heal digestive tract issues, boosts hormone production